Means of engraving dies



Aug. 18, 1936. H PlTMAN ZQQSLIOZ MEANS OF ENGRAVING DIES 'Original Filed Marh 19, 1931 3 Sheets-sheaf 1 r'nii n IJWEMOR Henry L. P/mmn.

A TTORNEY Aug. 18, 1936.

H. L. PITMAN MEANS OF ENGRAVING DIES Original Filed March 19, 1931 g sheets sheet 2 INVENTOR Henry LflPifman.

A TTORNEY Aug. 18, 1936.

H. L. PITMAN MEANS OF ENGRAVING DIES Original Filed MaI oh 19, 1931 3 Sheets-Sheet 3 Kurt! llll 55; .525 I1 I L r FFE E.

Henry L. P/fman. BY 2 2 2 I ATTORNEY Patented Aug. 18, 1936 MEANS OF ENGRAVING DIES Henry L. Pitman, Westfield, N. J., assignor, by

inesne assignments, to Ralph C. Coxhead Corporation, New York,

Delaware N. Y., a corporation of 15 Claims.

This invention is a division of my application Serial No. 523,920, filed Mar. 19, 1931, now Patent Number 2,010,036. It relates to means of engraving dies used in making a type carrier or shuttle of the kind illustrated in my application, Serial No. 523,919, filed Mar. 19, 1931.

A feature of the invention relates to means for engraving a plurality of types in segmental die sections which are subsequently used to produce types of a segmental type shuttle for typewriting machines.

Other features and advantages will hereinafter appear.

In the drawings which form part of the specification.

Fig. 1 is a front view, partly in section, of the die showing two shuttles therein;

Fig. 2 is an end view of the interior of the die unit at the right in Fig. 1;

Fig. 3 is a top plan view of a portion of the die engraving means;

Fig. 4 is a vertical section taken on the line 4-4 of Fig. 3;

Fig. 5 is a side elevation of the fixture for supporting and adjusting a die section in the engraving machine;

Fig. 6 is an end elevation of Fig. 5; Fig. '7 is a sectional view of a portion of one of the die sections; and

Fig. 8 is a top plan view of a partly formed shuttle.

Similar reference characters represent similar parts throughout the several views.

The die 3! comprises detachable sections 32, 33, 34 and 35, which may be assembled, in a manner hereinafter described, and it may then be supported by the jaws 3B of a stationary chuck.

The sections, after they are assembled, form a circular aperture 30 into which are placed one or more partly formed shuttles 29 (Fig. 8). Suitable roller means, not shown, are then inserted into the die aperture 30 and reciprocated by suitable means to flow the metal of the body part 23 of the shuttle into types 42 (Figs. 1 and '7) in intaglio in said die, to form types 03 on the convexed face of the type shuttle, the type intaglios 42 being engraved in the surface bordering the aperture 30 of the die.

The die sections 32, 33, 34, and 35 are rigidly held together and are interlocked to prevent accidental shifting thereof relatively to each other. For this purpose each of the die sections is provided with cross tongues SI and 52 (Figs. 1 and 2) which fit into corresponding grooves 53 and 54 of the adjoining section to thus locate the which is detachably mounted on the die by screws After the flange 55 is attached to the die two partially formed shuttles 29 are placed into the aperture 30 thereof, each being located laterally in a channel 58 (Fig. 2) formed by inwardly extending flanges 59 on the die sections; said shuttle blanks being located circumferentially of the aperture by gauge blocks 30 located in slots SI and extending across the channel 58.

Another flange (not shown) similar to the flange 55, is subsequently secured to the opposite face of the die. The flange 55 and its companion are provided with grooves to conform with the shape of the flanges Z1 and 28 of the shuttle blanks and into which the shuttle flanges fit. Thus it will be understood that the shuttle blanks are firmly secured in the die after the ring like flanges are secured thereto, to assist in preventing accidental shifting of the shuttle blanks While being acted upon by the roller means. 'Each shuttle is provided with a complete font of type which is divided into two groups, the types on one shuttle being formed by complemental die sections 32 and 33, Fig. 1, each section forming one of the groups of types, the types on the other shuttle being formed similarly by the complemental die sections 34 and 35.

The die sections 32, 33, 34, and 35 are engraved individually and for this purpose each may be mounted on a fixture I00 comprising a bracket IUI which may be secured by clamps I02 to a work-table I03 of an'engraving machine similar to the one disclosed in the patent to Taylor No. 542,902, dated July 16, 1895.

Type patterns I04, of which there is one for each type to be engraved in the die, are flat and are secured, one at a time, in a fixture I05 (Figs. 3 and 4) secured, in a manner hereinafter described, to a pattern supporting table I3I of the engraving machine. The pattern I00 has a character I06 sunk therein which may be about ten times larger than the types 42 of the die. A tracer or stylus I01 engaging the pattern is secured to an arm I08 of a pentograph, not shown, which supports an engraving or routing tool I09 (Fig. 6) operating on the concaved surface of the die section to engrave the types 42 with flat faces thereinto.

The various patterns are secured in the same position successively, in a manner hereinafter described. Accordingly the engraving tool I09 operates always in the same area. Consequently provision is made to letter space the die section to locate it in its various letter space positions in the same line or tier of types. Provision is also made to shift said die section to any one of the tiers or rows IIO, III, and H2 of types.

To locate the die section in its various letter space positions with respect to the engraving tool I00, it is carried by an indexing sector or support I I 5 (Figs. 5 and 6) pivotally supported by a shaft H5 upon a bracket IOI. The die section is located on the sector H5 by dowel pins II6 mounted on said sector and extending into holes II! of the die section; the die section being secured by screws I I8 extending through holes I I9 and threaded into the sector I I5. The sector I I5 is provided with a series of holes I20 arranged in an arc struck about the axis of the shaft H5 and spaced angular distances corresponding to those between the types on the shuttle. A pin I2 I, supported in the bracket IOI, is provided with a reduced end I2I to enter any one of the holes I20 to locate and assist in holding the sector I I5 in any one of its positions. A nut I22 is threaded onto the shaft II5 by which the sector I I5 may be permanently secured in its adjusted position.

Thus it will be understood that the die section is adjustable angularly to its various type positions. It will also be understood that, due to the flat pattern I06, the types 42 engraved in the die section are formed with flat faces I23 (Fig. 6) so as to produce flat faces on the types 3| on the shuttle; fiat faced types being highly desirable so as to prevent buckling of the work sheet by said types while printing.

On the sector I I5 there is provided a stud H6 which extends into the groove 53 of the die sector and prevents incorrect mounting of any one of the die sections on said sector which may otherwise result in having the types upside down on one of the die sections with respect to its complement.

As illustrated in Fig. 6 the die section 33 is sup-.

ported on the fixture I and the holes I20 to the left of the sector II are not used for said die section since only that portion of the die section to the right of the slot 6| therein is'to be engrayed. When, however, either of the adjacent 75; I27 and the edge I30 of the bracket IOI.

die sections 32, 34 is supported in the fixture I 00, the holes I to the left of the sector II5 are used.

For the purpose of locating the die section so as to bring any one of the various rows or tiers of types to the tool I09, there'is provided a guide or gauge bar I secured to the table I03 by a clamp I26, said guide bar extending parallel with the axis of the shaft H5 and being engaged by the side edge of the bracket IOI. Toloc'ate the tier IIO of types, (Fig. 3) at the engraving tool I09, the bracket IOI is placed with its side edge against the guide bar I25, and its end I is placed against a gauge I2I secured to the table I03 by a bolt I28. The bracket IOI is then secured in this position bythe clamps I02. When the middle tier I II of types is to be located at the engraving tool a gauge block I 30, equal in width to the distance from the middle of one tier of types to the middle of the adjacent tier, is placed between the gauge When the tier II2 of types is to be located at the en-' graving tool a gauge block (not shown) twice the width of the block I30 is placed between the gauge bar I21 and the edge I30 of the die supporting bracket; the bracket being held in each of its adjusted positions by the clamps I02.

Thus it will be understood that there is provided a fixture I00 comprising a sector II5 supported by a shaft H5 on a bracket IOI so that it. may be adjusted about the axis of said shaft and relatively to the engraving tool I09, for the various types in a tier; said fixture being adjustable as a whole lengthwise of the axis of the shaft I I5 relatively to the engraving tool to shift any one of the type tiers to said tool.

The fixture I05 for holding the patterns or masters I04 may be secured to the table I3I of the engraving machine, by a pair of C-clamps I3 I (Fig. 3). Said fixture comprises a base plate I 32 having a transverse groove I33 therein into which the pattern I04 may be slid from one side. A longitudinal groove I34 has a slide I35 located therein which, after the pattern is in position, is pushed by a finger-piece I36, towards the pattern plate I04 to cause a tooth I3'I of the slide I35 to enter a notch I38 to lock the plate I04 against accidental lateral shifting and to position it properly on the fixture I05, the notch I38 in each pattern or templet I04 bearing a definite relation to the letter thereon. A thumb nut I39 threaded on a stud I39 secured to the base plate I32 is then tightened to clamp said slide I35 in place. Fingers I40 and MI on the base plate I32 and slide I35, respectively, overlap the edges of the pattern plate I04 to assist holding said plate in the groove I33. The pattern holding fixture I05 is positioned parallel to the die supporting fixture I00 and both are angularly disposed on their respective tables for clearance Durposes in the machine.

The matrices or die sections are composed of steel and after they have been engraved they are hardened so as to stand up subsequently in the process of manufacturing the type shuttle, said process being described in my above mentioned Patent 2,010,036.

Heretofore type shuttles have been made by first engraving a master wheel, actual size, by hand, and then using the master wheel to produce the segmental matrices, by a molding process, which matrices were subsequently used in the production of the shuttle, by a further process of molding.

Said method, which requires the making of a" master wheel, is not only extremely expensive but does not lend itself to the interchangeability of the types, in accordance with certain desired arrangements. For example in code writing the letters on the shuttle are arranged differently although the letters on the type keys are unchanged or, in other words, arranged in their usual order. Sometimes it is also desirable to have the numerals in the top row of types on the shuttle'instead of the lower row. In order to produce shuttles with these changes it has been necessary to hand engrave a new master wheel which, as previously stated, is extremely expensive.

It will be understood that with the present invention these changes of the characters on the shuttle may readily be produced, at a minimum of expense, by machine engraving a set of matrices to suit the desired arrangement of types, by simply using the templets or copies I04 in the corresponding order. Thus special shuttles comprising various arrangements of characters such as letters, numbers, and marks, and also shuttles with various combinations of sizes or styles of types may be readily produced at a comparatively low cost.

' While certain preferred embodiments of the invention have been shown and described, it will be understood that changes in the form, arrangements, proportions, sizes and details thereof may be made without departing from the scope of the invention as defined in the appended claims.

I claim:-

1. In a type engraving machine, a fixture for holding a pattern to be traced by a stylus, said fixture including a stationary base plate having a transverse groove and a longitudinal groove therein, the latter extending into one side of the transverse groove, the pattern being insertable into the transverse groove from one end thereof, a slide in the longitudinal groove, a tooth on the slide to engage in a notch in the pattern to locate the pattern transversely of the fixture, fingers secured to the base plate, and fingers on the slide, all of said fingers to overlap the pattern to assist in holding the pattern in its groove, and means to clamp the slide in place on the base plate.

2. In a fixture for use in a machine for engraving types in a segmental die section and including with an engraving tool to operate in a definite area, the combination of a bracket having a base and an arm thereon, a die support, means to pivotally support the die support on the arm of said bracket, position determining means on said die support, means on said arm to cooperate with the position determining means to locate the die support angularly in any one of a plurality of predetermined angular positions on the bracket and relatively to the engraving tool, and means to secure the die support in its adjusted position.

3. In a fixture for use in a machine for engraving a die having a concaved surface struck about a center, the machine having an engraving tool adapted to operate in a definite area, and means to guide the engraving tool to cut types in the concaved face of the die, the combination of a support for said die, a bracket, means to secure said bracket, a shaft by which the support is mounted on the bracket, the axis of the shaft registering with the center of the curved surface, means to locate the support and its die in various angular positions about the axis of the shaft rela tively to the engraving tool, and means to secure said support in its adjusted position on said bracket.

4. In a fixture for use in a machine for engraving a die having a concaved surface struck about a center, the machine having an engraving tool adapted to operate in a definite area, the combination of a bracket, means to secure said bracket, a support for said die, a shaft by which the support is mounted on the bracket, the axis of the shaft registering with the center of the curved surface, said support having a series of holes arranged in an are about the axis of said shaft, a pin in said bracket to engage in any one of said holes to locate the die in various angular positions relatively to the engraving tool, and means to secure the support to hold the die in its adjusted position.

5. In a fixture for use in a machine for engraving a die having a concaved surface struck about a center, the machine having an engraving tool adapted to operate in a definite area, the combination of a bracket, means to secure said bracket, a shaft to mount the support on the bracket, the axis of the shaft registering with the center of curvature of the concaved surface, means to locate the support and itsdie in various angular positions about the axis of the shaft relatively to the engravin'gtool, and means to effect an adjustment of said bracket with said die lengthwise of the axis of said shaft.

6. In a device for use in .an engraving machine, the machine having an engraving tool to operate in a definite area, a table, a pattern secured to the machine, and means including a stylus to trace the pattern to control said tool, the combination of a bracket secured to said table to support a die, means to locate the bracket parallel'with the pattern, and means to facilitate an adjustment of said bracket to move the die transversely of itself to various positions relatively to said tool.

'7. In a device for use in an engraving machine, the machine having an engraving tool to operate in a definite area, a table, a pattern secured to the machine, and means including a stylus to trace the pattern and control the tool, the combination of a bracket secured to said table to support a die, a gauge on said table to locate the bracket parallel to the pattern, a second gauge to engage the edge of'the bracket to locate the die in a direction transversely of itself, and a gauge block insertable between the edge of the bracket and the second mentioned gauge to change the position of said die relatively to the engraving tool.

8. In a device for use with an engraving machine, the machine having an engraving tool confined to a definite area to engrave types on the concaved face of a die, the combination of a holder to support the die, means whereby an angular adjustment of the holder may be effected to letter space the die, means to locate the die on said holder, and means to prevent incorrect mounting of the die on said holder.

9. In a device for use with an engraving machine, the machine having a frame, and an engraving tool confined to a definite area to engrave types on the concaved surface of a die, the combination of a holder on said frame to support the die, means whereby an angular adjustment of the holder may be effected to letter space the die, means to locate the die on said holder, means to secure the die on the holder after it has been located, and means to prevent incorrect mounting of the die on the holder.

10. In a device for use in an engraving machine, the machine having a frame, and an engraving tool confined to a definite area to engrave types on the concaved face of a die, the combination of a holder on said frame to support the die, means whereby an angular adjustment of the holder may be effected to letter space the die, two dowel pins to locate the die on said holder, and a device on said holder to engage the die to prevent incorrect mounting thereof on said holder.

11. In a device for use in an engraving machine, the machine having a frame, and an engraving tool confined to a definite area to engrave types on the concaved face of a die, the combination of a holder on said frame to support the die, means whereby an angular adjustment of the holder may be effected to letter space the die, means to locate the die on said holder, and a pin on said holder to engage in a groove at one end a holder on said frame to support the die, means of predetermined dimensions whereby letter spacing may be efiected between the engraving tool and the holder, and means of predetermined dimensions whereby line spacing may be effected between the engraving tool and theholder.

13. A fixture for holding a pattern in a type engraving machine, said fixture including a base plate, three raised members on the upper face of said base plate, two of said members being arranged parallel and spaced from each other, the third member being arranged perpendicular to the other two members and spaced from the ends of the parallel members, all of said members forming a T groove on the top face of said base plate, the pattern being insertable into the head of the T groove, means to locate the pattern in thexhead of said T groove, a slide in the arm of the T groove, said slide engaging said pattern to assist in holding the latter on the fixture, and means to secure said slide on said fixture.

14. In a type engraving machine, a fixture for holding a pattern to be traced by a stylus, said fixture including a stationary base plate having a transverse groove therein into which the pattern may be inserted from one end thereof, said base plate having also a longitudinal groove extending into only one side of the first, mentioned groove,

a slide supported in and guided by the longitudinal groove, means on said slide to locate said pattern lengthwise of said transverse groove, said slide being also effective to hold the pattern against the opposite side of the transverse groove, and means to secure the slide in its effective position to assist in preventing accidental displacement of said pattern.

15. In a type engraving machine, a fixture for holding a pattern to be traced by a stylus, said fixture including a stationary base plate having a transverse groove therein into which the pattern may be inserted from one end thereof, said base plate having also a longitudinal groove extending into only one side of the transverse groove, a slide supported in the longitudinal groove, means on said 'slide tolocate the pattern in a definite position lengthwise of the transverse groove, said slide being also efiective to hold the pattern against the opposite side of the transverse slot, means onrthe base plate to overlap one edge of the pattern, means on said slide to overlap the opposite edge of said pattern to assist in holding the pattern in the groove, and means to secure said slide in its eifective position to assist in preventing accidental displacement of said pattern.

HENRY L. PITMAN. 

